Attachment toe



G. A. LUNZL NON-SKIDDING 'ATTACHMENT FOR VEHICLE WHEELS. APPLICATION FILED MAR. 14, 1919.

1,320,401 Patented Nov. 4, 1919.

' To all ivhom ii may concern:

- UNITED STATES GEORGE A.

PATENT ornron.

LUNZ, or BUFFALO,.-1\TEW YORK.

noN-sKIDDIivs ATTACHMENT m VEHICLE-WHEELS.

I Specification of Letters Patent.

PatentedNov. 4, 1919.

7 Application filed'Mareh 14, 1919. Serial No. 282,530.

'Be it known that I, GEoR'Gn A. LUNZ, a citizen of the United States," residing at Buffaloyin the county of Erie andState of New York, have invented new and useful Im-" provements in Non- Skidding Attachments for Vehicle-Wheels, ofwhich the following vision of a reliable and inexpensive device whlch can be readlly apof this character plied and removed, and which is supported separately from the tire, or wear of the same by the attachment.

Another object is toso construct the attachment as to increase the traction of the,

wheel upon slippery'pavements' and roadways.

the tread.

In the accompanying drawings:

' Figure 1 is a side elevation of a vehicle wheel equipped with the improvement. Fig. 2 is a transverse section thereof on line 22, Fig. 1. Fig. 3 is anenlargedsectionalelevation of one of-the-ring-sections and attached parts. Fig. 4 is a transverse section on'line44, Fig. 5 is an enlarged cross section of the felly and adj acent'parts. Fig. 6 is a fragmentary perspective view-of Similar characters .of reference indicate corresponding parts throughout the several views.

of the demountable type,encircles the felly in the customary manner and carries a matic or other suitable tire'5.

The safety attachment isarranged at the outer side of the wheel, and comprises circular non-skldding tread or band 6 car-' ried by a ring or annular frame 7 removably secured to the felly by transverse bolts 7 or other appropriate fastenings. In its preferred form theband is composed of a suitable number of independently-yielding segments or sections each having a tread edge of zig-zag sinuous or crenelate form, as shown, thus presenting non-skidding edges a running lengthwise of the band, and traction edges 79 extending crosswise of the band, which increase the traction of the wheel and prevent its slipping or spinning.

especially on slippery pavementsand roadways.

to avoid cutting M contact with each other tread band is practically riding of the car.

pneustarting the vehicle.

- of the'ring, but are rods,

These sections may be stamped or bent from strips of steel of appropriate dimensions, satisfactory results being ob tained with strips about an inch in width and from one-eighth to one-fourth of an inch in thickness. In the drawings four tread-sections are shown, but a greater or less number may be employed, if desired.

Suitably secured to the tread-sections and extending inwardly therefrom, are radial rods 8, theinner portions of which slide in,

bearings 9 carried by lu'gs or brackets 10 projecting from rods being retained in the bearings by nuts 11 applied to their inner ends. Surround ing these rods are springs 12which are interposed between the tread sections and washers 13 seated against the outer sides of the bearings 9. The resistance of the springs is such as to press the band-sections against. the road or pavement and yet allow them to yield to stones, ridges or other obstructions the springs serving to absorb any shocks received by the tread. adjacent sections essary' extent .to prevent their coming in and being buckled when the vehicle is loaded. But notwithstanding this sectional construction, the continuous and does not therefore interfere with the easy 1 The rods 8 are preferably fitted loosely in their bearings, asshown in Fig. 4'and y y in 'connectionwitlr the 1 indicates the hub, 2 the spokes" and3 the fellyof a vehicle wheel. IA rim 4, preferably middle bearing in ring 7' and avoid undue strain on them in To that end, the bearings are slotted or elongated in the plane I sufficiently narrow to prevent lateral or transverse play of the as seen in Fig. 4. A suitable number of such rods is employed to properly support the sections, three rods being provided the face of the ring 7, the

v Normally, are separated to the new for each section in the example illustrated in the drawings.

The supporting ring 7 is preferably composed of sections corresponding to those of the tread, so that the attachment as a whole is made. up of sections or units each consisting of a tread-section, a ring-section and a number of connecting rods and springs. This sectional construction facilitates the application and removal of the attachment and also enables one or more parts to be renewed, if: necessary, without requiring renewal oi the entire attachment.

Ordinarily, two bolts 7 are sufiicient to fasten each ring-section to the wheel, but a dilterent number may be employed if desired. In order to permit the ring-sections to pass under or behind the usual depressed flange 4 of the demountable rim 4:, each of the ring-sections is provided with paral lel, obliquely arranged slots 1% for the passage of the fastening bolts 7. In assem bling the parts, this slotted constructio'i'r permits the ring-sections to be shifted on said bolts toward the axis or the wheel sutficiently to clear said depressed rim-flange, as shown by dotted lines in Fig. 5, and then to be shifted in the opposite direction sufficiently to overlap the customary beveled locking ring P of the demountable rim, as shown by full lines. These ring-sections thus perform the additional function of retaining said rim in place on the telly and dispense with the usual retaining lugs.

In practice, the tread band 1s of substantially .the same external diamater as the tire, gripping the roadway or pavement and yielding with the tire under the weight and vibrations of the vehicle. Being of sin uous or zig-zag outline, the tread presents two sets of gripping edges, one set resisting skidding and the other resistingspinning of the wheel and increasing its traction, as

cle-wheels, comprising a supporting inem ber adapted to be attached to the side of a wheel, and a tread-band of slnuous form carried by said member and arranged to Copies of this patent may be obtained for movable bear edgewise against the pavement, the

cavities formed by the bends of the treadband being open and unobstructed both at their inner and outer edges and through out the width of the band.

2. A non-skidding attachment for vehi- -cle wheels comprising a supporting 'member adapted to be attached to the side ota wheel, and a tread-band carried by said member and consisting oi a strip bent into crenelate form and arranged to bear edgewise against the pavement. r

3. A non-skidding attachment for vehicle wheels, comprising a supporting member adapted to beattached to the side of a vehicleswheel, a tread-band carried by said member and having a gripping edge of crenelate form, said band being composed of radially-movable sections guided on said supporting member, and resisting springs interposed between said sections and said supporting member.

4. A non-skidding attachment for vehicle wheels, comprising a. supporting member adapted to be attached to the side of a vehicle wheel, a tread-band.carried by said member and composed of radially-movable sections having nonskid edges, radiallysliding rods secured to said. sections and guided on said supporting member, said rods being capable of rocking on said supporting member in the plane of the ring, but held from rocking in a plane at right angles to said ring, and springs for resisting the in ward movement of the sections. 1

5. A non-skidding attachment for vehicle-wheels, comprislng a supporting ring adapted to be attached to theside of a vehicle-wheel, said "ringcarryingg an annular series of brackets having bearing-slots arranged in theplane of said ring, a tread-- band "composed of independent, radiallysections, said sections having guide-rods slidable' in said bearing-slots,land said slots being sufficiently narrow ,toiresist transverserocking of said rods, and springs interposed between said brackets and said sections. a

(GEORGE A; LUNZ.

five cents each, by addressing the Commissioner of Patents, Washington, .D. G. 

